CN109887259A - A kind of single wire transmission device and method - Google Patents
A kind of single wire transmission device and method Download PDFInfo
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- CN109887259A CN109887259A CN201910130289.1A CN201910130289A CN109887259A CN 109887259 A CN109887259 A CN 109887259A CN 201910130289 A CN201910130289 A CN 201910130289A CN 109887259 A CN109887259 A CN 109887259A
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- data preparation
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Abstract
The present invention provides a kind of single wire transmission device and methods, comprising: host computer, from equipment and single line and described is connected between equipment by the single line host computer；The host computer transmission drop-down reset pulse is described to respond the drop-down reset pulse from equipment and carry out Data Preparation to the single line；The inquiry drop-down pulse that the host computer sends detects described whether complete Data Preparation from equipment to the single line, in the state of the completion Data Preparation from equipment, the host computer sends reading data drop-down pulse and reads the data from equipment to the single line.Hardware resource can be effectively saved through the invention and improves communication efficiency, solve the problems, such as waste of the prior art to hardware resource and software resource.
Description
Technical field
The present invention relates to electronics and fields of communication technology, and in particular, to a kind of single wire transmission device and method.
Background technique
Single wire transmission system design be, as generallyd use in temperature monitoring system be company, Dallas monobus
Temperature sensor, communication process is complicated, uses two-stage command format；In order to guarantee the accurate of data, it is also provided with 8 data schools
Calculating is tested, the difficulty of the software greatly increased write, while wasting the resource of host computer.
In the system design of I2C bus, clock line is needed to connect with two buses of data line with host computer.Two independences
There are also the limitation of timing between bus, control logic complexity is considerably increased.And relative to quick single-wire-protocol system,
I2C in PCB layout more than line.
In conclusion the prior art all causes the waste of electric energy and resource to hardware resource and software resource.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of single wire transmission device and methods.
A kind of single wire transmission device provided according to the present invention, comprising: host computer, from equipment and single line, the host computer
And it described is connected between equipment by the single line；
The host computer transmission drop-down reset pulse is described to respond the drop-down reset pulse simultaneously from equipment to the single line
Carry out Data Preparation；
The inquiry drop-down pulse that the host computer sends detects described whether complete data preparation from equipment to the single line
Work, in the state of the completion Data Preparation from equipment, the host computer, which is sent, reads data drop-down pulse to institute
Single line is stated to read the data from equipment.
Preferably, further including external pull-up resistor or built-in pull-up resistor；
One end of the external pull-up resistor connects the single line, and the other end connects VCC and described from equipment, constitutes external
Open drain circuit；
One end of the built-in pull-up resistor connects the single line, and the other end is connected inside equipment with VCC described,
Constitute built-in open drain circuit.
Preferably, the duration of the drop-down reset pulse is greater than 220us.
Preferably, the inquiry drop-down pulse duration is less than 1us.
Preferably, in the state of the completion Data Preparation from equipment, it is described to be held from the equipment drop-down single line
Continuous 2T time, the T are the minimum period from equipment.
A kind of single line transmission method, comprising:
Step 1: host computer sends drop-down reset pulse to single line, and the slave equipment on single line responds the drop-down reset pulse
And carry out Data Preparation；
Step 2: the inquiry drop-down pulse that the host computer sends detects described whether complete number from equipment to the single line
According to preparation, in the state of the completion Data Preparation from equipment, the host computer, which is sent, reads data drop-down arteries and veins
It rushes to the single line to read the data from equipment.
Preferably, the duration of the drop-down reset pulse is greater than 220us.
Preferably, the inquiry drop-down pulse duration is less than 1us.
Preferably, in the state of the completion Data Preparation from equipment, it is described to be held from the equipment drop-down single line
Continuous 2T time, the T are the minimum period from equipment.
Preferably, returning to R0==0 R1==0 simultaneously, table in the state of the completion Data Preparation from equipment
Show and completes Data Preparation.
Compared with prior art, the present invention have it is following the utility model has the advantages that
Hardware resource can effectively be saved through the invention and improve communication efficiency, solve the prior art to hardware resource and
The waste problem of software resource.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the structure chart of single-wire communication device of the present invention；
Fig. 2 is pulse schematic diagram of the invention；
Fig. 3 is work flow diagram of the invention.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
As shown in Figure 1, a kind of single wire transmission device provided by the invention, comprising: host computer, from equipment, single line and pull-up
Resistance, host computer and is connected between equipment by single line, and one end of pull-up resistor connects single line, the other end connect VCC and from
Equipment constitutes open drain circuit.
Pull-up resistor includes external pull-up resistor R or built-in pull-up resistor Ri, one end connection single line of external pull-up resistor,
The other end connects VCC and from equipment, constitutes external open drain circuit；One end of built-in pull-up resistor connects single line, the other end
It is being connected inside equipment with VCC, is constituting built-in open drain circuit.
Host computer sends drop-down reset pulse to single line, responds drop-down reset pulse from equipment and carries out data beam worker
Make；
Host computer sends inquiry drop-down pulse and detects to single line from whether equipment completes Data Preparation, from equipment
In the state of completing Data Preparation, host computer sends reading data drop-down pulse and reads the data from equipment to single line.
In the present embodiment, it can be measurement temperature from equipment, humidity, magnetic field, pressure, speed, acceleration, voltage, and
The sensor chip of the physical quantitys such as electric current.
Pull down the duration T of reset pulseresetIt, can also according to the demand of user, at single wire device end greater than 220us
It changes, such as 440us, 880us, 1760us etc..Inquire drop-down pulse duration TiniLess than 1us.Data are completed from equipment
In the state of preparation, continue the 2T time from equipment drop-down single line, T for from the minimum period of equipment, representative value in 15us,
20us, 25us, 30us, 35us etc..
If not completing physical quantity from equipment, single line would not be pulled down；Otherwise single line will be pulled down, R0 is obtained.
If host computer obtains R0==0, upper computer equipment needs are reaffirmed after obtaining R1==0, are shown certain from equipment
Data preparation is complete.
As shown in Fig. 2, TbbIt is connected to the time interval of two reading data, representative value is greater than 10us.Host computer sends 19
A reading data drop-down pulse reads data, and data bit weight format is as shown in table 1:
Table 1
On the basis of above-mentioned single wire transmission device, the present invention also provides a kind of single line transmission methods, comprising:
Step 1: host computer sends drop-down reset pulse to single line, and the slave equipment response drop-down reset pulse on single line is gone forward side by side
Row Data Preparation；
Step 2: host computer sends inquiry drop-down pulse and detects to single line from whether equipment completes Data Preparation,
In the state of equipment completion Data Preparation, host computer sends reading data drop-down pulse and is read to single line from equipment
Data.
Preferred embodiment 1
The present invention is implemented host computer and single line temperature device point-to-point connection through single line, and host computer is by sending one
Drop-down pulse allows chip temperature to start to work, and temperature transition is completed, and host computer can read the temperature value of chip temperature, entirely
Process is quick, scans for and matches without other orders.The time, which is not received, in single wire device continues TresetUs length position
When reset pulse, single wire device is without temperature transition process, and power consumption is very low.
Such as Fig. 3, the drop-down pulse of host computer sending time position 500us, chip temperature responds this drop-down pulse, start into
Trip temperature conversion, it is all to read temperature value after 0 that host computer, which obtains flag bit R0 and R0,.The wherein C that 17bit temperature is read
LISP program LISP is as follows
It is above to implement only by taking chip temperature as an example, and it is not limited to chip temperature.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (10)
1. a kind of single wire transmission device characterized by comprising host computer, from equipment and single line, the host computer and it is described from
It is connected between equipment by the single line；
The host computer transmission drop-down reset pulse is described to respond the drop-down reset pulse from equipment and carry out to the single line
Data Preparation；
The inquiry drop-down pulse that the host computer sends detected to the single line it is described whether complete Data Preparation from equipment,
In the state of the completion Data Preparation from equipment, the host computer, which is sent, reads data drop-down pulse to the single line
To read the data from equipment.
2. single wire transmission device according to claim 1, which is characterized in that further include external pull-up resistor or built-in pull-up
Resistance；
One end of the external pull-up resistor connects the single line, and the other end connects VCC and described from equipment, constitutes external drain electrode
Open-circuit；
One end of the built-in pull-up resistor connects the single line, and the other end connects inside equipment with VCC described, in composition
Set open drain circuit.
3. single wire transmission device according to claim 1, which is characterized in that the duration of the drop-down reset pulse is big
In 220us.
4. single wire transmission device according to claim 1, which is characterized in that the inquiry drop-down pulse duration is less than
1us。
5. single wire transmission device according to claim 1, which is characterized in that complete Data Preparation from equipment described
In the state of, described to continue the 2T time from the equipment drop-down single line, the T is the minimum period from equipment.
6. a kind of single line transmission method characterized by comprising
Step 1: host computer sends drop-down reset pulse to single line, and the slave equipment on single line responds the drop-down reset pulse and goes forward side by side
Row Data Preparation；
Step 2: the inquiry drop-down pulse that the host computer sends detects described whether complete data standard from equipment to the single line
Standby work, in the state of the completion Data Preparation from equipment, the host computer, which is sent, reads data drop-down pulse extremely
The single line is to read the data from equipment.
7. single line transmission method according to claim 6, which is characterized in that the duration of the drop-down reset pulse is big
In 220us.
8. single line transmission method according to claim 6, which is characterized in that the inquiry drop-down pulse duration is less than
1us。
9. single line transmission method according to claim 6, which is characterized in that complete Data Preparation from equipment described
In the state of, described to continue the 2T time from the equipment drop-down single line, the T is the minimum period from equipment.
10. single line transmission method according to claim 6, which is characterized in that complete data preparation work from equipment described
R0==0 R1==0 simultaneously is returned in the state of work, indicates to complete Data Preparation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130289.1A CN109887259B (en) | 2019-02-21 | 2019-02-21 | Single-wire transmission device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130289.1A CN109887259B (en) | 2019-02-21 | 2019-02-21 | Single-wire transmission device and method |
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| Publication Number | Publication Date |
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| CN109887259A true CN109887259A (en) | 2019-06-14 |
| CN109887259B CN109887259B (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910130289.1A Active CN109887259B (en) | 2019-02-21 | 2019-02-21 | Single-wire transmission device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111476991A (en) * | 2020-03-06 | 2020-07-31 | 上海申矽凌微电子科技有限公司 | Double-point temperature measurement system and method suitable for master-slave single bus communication protocol |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727422A (en) * | 2008-10-29 | 2010-06-09 | 大唐移动通信设备有限公司 | Method and system for controlling unibus equipment |
| CN202710107U (en) * | 2012-07-25 | 2013-01-30 | 黄军辉 | Single-bus digital temperature and humidity sensor and online real-time monitoring system thereof |
| CN103823776A (en) * | 2014-02-28 | 2014-05-28 | 上海晟矽微电子股份有限公司 | Unibus in communication with master equipment and slave equipment and communication method |
| CN104657303A (en) * | 2014-10-13 | 2015-05-27 | 江苏瑞微电子有限公司 | Unibus data communication method |
| CN106644112A (en) * | 2016-11-10 | 2017-05-10 | 合肥移顺信息技术有限公司 | Field programmable gate array (FPGA)-based industrial field temperature acquisition and alarm method and device |
| US10108578B2 (en) * | 2013-09-11 | 2018-10-23 | Texas Instruments Incorporated | Single wire communications interface and protocol |
-
2019
- 2019-02-21 CN CN201910130289.1A patent/CN109887259B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727422A (en) * | 2008-10-29 | 2010-06-09 | 大唐移动通信设备有限公司 | Method and system for controlling unibus equipment |
| CN202710107U (en) * | 2012-07-25 | 2013-01-30 | 黄军辉 | Single-bus digital temperature and humidity sensor and online real-time monitoring system thereof |
| US10108578B2 (en) * | 2013-09-11 | 2018-10-23 | Texas Instruments Incorporated | Single wire communications interface and protocol |
| CN103823776A (en) * | 2014-02-28 | 2014-05-28 | 上海晟矽微电子股份有限公司 | Unibus in communication with master equipment and slave equipment and communication method |
| CN104657303A (en) * | 2014-10-13 | 2015-05-27 | 江苏瑞微电子有限公司 | Unibus data communication method |
| CN106644112A (en) * | 2016-11-10 | 2017-05-10 | 合肥移顺信息技术有限公司 | Field programmable gate array (FPGA)-based industrial field temperature acquisition and alarm method and device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111476991A (en) * | 2020-03-06 | 2020-07-31 | 上海申矽凌微电子科技有限公司 | Double-point temperature measurement system and method suitable for master-slave single bus communication protocol |
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| CN109887259B (en) | 2020-09-22 |
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